YZ450F Piston CP Pistons YZ 450 High Compression, Standard Bore and Yamaha YZ450F Big Bore Piston Kits
CP Pistons, for those that demand the ultimate in engine performance!
High performance and racing Yamaha YZ 450 piston kits are available from CP Pistons for all model years of the YZ450F four stroke dirt bikes. Standard bore and big bore YZ450F piston kits are all available here. These forged pistons will work with oversize valves as well as high lift camshafts as they include oversize valve reliefs. They incorporate a "X" style forging for greater strength, durability and reduced weight. Along with the full radius dome designs, high performance piston rings and lightweight piston pins, these pistons offer the highest quality and are engineered for maximum power output.
CP Pistons YZ450F dirt bike racing pistons are used by top professional riders and teams.
Standard Features included with each Yamaha YZ450F CP Piston Kit:Standard series pistons have a "M" in the part number |
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| Double forced pin oilers | Fully CNC Machined |
| Accumulator groove | Pick lock removal grooves |
| Anti detonation grooves | X-style forging |
| Light weight pins | Balanced to + or - 1 gram |
Additional Features for "Project X" Series YZ 450F PistonsProject X Series pistons are the result of the latest in ultra high performance technology improvements from CP. Pistons listed below with "mx" preceding the part number are part of the new "Project X" piston line up. Project X series pistons have a "MX" in the part number |
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| Leading edge racing piston technology | Fully boxed style forging for ultimate strength, durability and power |
| Coated Piston Skirts | Internal windows allow additional oil to flow to pin |
| New piston skirt designs maximize power and reduce piston rocking | Wrist pins treated with proprietary coating to eliminate pin galling |
Get HOLESHOT WINNING POWER with CP Pistons!
CP Yamaha YZ450F Piston Kits and YZ 450F Big Bore Pistons
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2003 - 2005 YZ 450F Piston Kits and Big Bore KitsStock Bore: 3.740 (95mm) Stock Stroke: 2.496 (63.4mm) OEM Stock CR = 12.5:1 |
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| Bore Size | Disp. | Comp | Installation Notes |
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| 95mm std. | 450 cc | 13.0-1 | deglaze cylinder | cpk1010 | cp m1010 | c7947 |
| 95mm std. | 450 cc | 13.5-1 | deglaze cylinder | cpk1111 | cp m1011 | |
| 97mm +2mm oversize big bore | 468cc | 13.0-1 | bore and replate cylinder | cpk1030 | cp m1030 | c3064 |
| 97mm +2mm oversize big bore | 468cc | 13.5-1 | bore and replate cylinder | cpk1031 | cp m1031 | |
| 98mm +3mm oversize big bore | 478cc | 13.5-1 | bore and replate cylinder | cpk1051 | cp m1051 | c7787 |
2003 - 2005 YZ 450F Full Race PistonFull race series pistons are custom forged pistons but available off the shelf. These are single ring, high compression, lightweight pistons which feature a highly efficient dome design that maximizes squish without compromising performance. Lateral gas ports are added to maximize ring seal while a skirt coating is included to improve power and provide additional lubrication, minimizing friction in extreme competition conditions.
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| Bore Size | Disp. | Comp | Installation Notes |
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| 95mm std. | 450 cc | 13.75-1 | deglaze cylinder | CPKX1143 | MX1043 | c7947 |
2003 - 2005 YZ450F Project X Platinum Racing Piston and Rod KitsProject X Platinum Kits feature the same top of the line products that serious professional mechanics and racers rely on. The redesigned piston and rod combo gives your engine a lightweight assembly that is engineered to give you more power and durability. Revolutionary to the industry, these types of assemblies were once only available as custom pieces at custom prices. Now, off the shelf and available, these kits are just the thing you need to transform your bike into a racing machine without breaking the bank.
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| Bore Size | Disp. | Comp | Installation Notes |
Gasket Kit |
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| 95mm std. | 450 cc | 13.5-1 | deglaze cylinder, standard wrist pin diameter with 2.5mm longer rod, Lightweight | CPKX1P43 | MX1P43 | C7947EST |
2006 - 2009 YZ450F Piston KitsStock Bore: 3.740 (95mm) Stock Stroke: 2.496 (63.4mm) OEM Stock Compression Ratio = 12.5:1
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| Bore Size | Disp. | Comp | Installation Notes |
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| 95mm std. | 450 cc | 13.0-1 | deglaze cylinder | CPK1110 | cp m1010 | c7908 |
| 95mm std. | 450 cc | 13.5-1 | deglaze cylinder | CPK1011 | cp m1011 | |
| 97mm +2mm oversize big bore | 468cc | 13.0-1 | bore and replate cylinder | CPK1130 | cp m1030 | c3178 |
| 97mm +2mm oversize big bore | 468cc | 13.5-1 | bore and replate cylinder | CPK1131 | cp m1031 | |
| 98mm +3mm oversize big bore | 478cc | 13.5-1 | bore and replate cylinder | CPK1151 | cp m1051 | |
2006 - 2009 YZ450F Full Race PistonFull race series pistons are custom forged pistons but available off the shelf. These are single ring, high compression, lightweight pistons which feature a highly efficient dome design that maximizes squish without compromising performance. Lateral gas ports are added to maximize ring seal while a skirt coating is included to improve power and provide additional lubrication, minimizing friction in extreme competition conditions.
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| Bore Size | Disp. | Comp | Installation Notes |
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| 95mm std. | 450 cc | 13.75-1 | deglaze cylinder | CPKX1043 | MX1043 | c7908 |
2006 - 2009 YZ450F Project X Platinum Racing Piston and Rod KitsProject X Platinum Kits feature the same top of the line products that serious professional mechanics and racers rely on. The redesigned piston and rod combo gives your engine a lightweight assembly that is engineered to give you more power and durability. Revolutionary to the industry, these types of assemblies were once only available as custom pieces at custom prices. Now, off the shelf and available, these kits are just the thing you need to transform your bike into a racing machine without breaking the bank.
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| Bore Size | Disp. | Comp | Installation Notes |
Gasket Kit |
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| 95mm std. | 450 cc | 13.5-1 | deglaze cylinder, standard wrist pin diameter with 2.5mm Longer Rod, Lightweight | CPKX1P44 | MX1P43 | C7908-EST |
2010 - 2014 YZ450FStock Bore: 3.819 (97mm) Stock Stroke: 2.394 (60.8mm) OEM Stock CR = 12.5:1 |
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| Bore Size | Disp. | Comp | Installation Notes |
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| 97mm std bore | 450cc | 13-1 | deglaze cylinder | CPKX1068 | MX1068 | C3395 |
| 97mm std bore | 450cc | 13.5-1 | deglaze cylinder | CPKX1070 | MX1070 | |
2010 - 2014 YZ450F Full Race PistonFull race series pistons are custom forged pistons but available off the shelf. These are single ring, high compression, lightweight pistons which feature a highly efficient dome design that maximizes squish without compromising performance. Lateral gas ports are added to maximize ring seal while a skirt coating is included to improve power and provide additional lubrication, minimizing friction in extreme competition conditions.
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| Bore Size | Disp. | Comp | Installation Notes |
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| 97mm std bore | 450cc | 13.75-1 | deglaze cylinder | CPKX1069 | MX1069 | C3395 |
2010 - 2014 YZ450F Platinum Project X Racing Piston and Rod KitsProject X Platinum Kits feature the same top of the line products that serious professional mechanics and racers rely on. The redesigned piston and rod combo gives your engine a lightweight assembly that is engineered to give you more power and durability. Revolutionary to the industry, these types of assemblies were once only available as custom pieces at custom prices. Now, off the shelf and available, these kits are just the thing you need to transform your bike into a racing machine without breaking the bank.
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| Bore Size | Disp. | Comp | Installation Notes |
Gasket Kit |
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| 97mm std bore | 450cc | 13.5-1 | deglaze cylinder, standard diameter wrist pin with 2.5mm longer rod, Lightweight | CPKX1P70 | MX1P70 | C3395 |
Carrillo Yamaha YZ 450F Connecting Rod |
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Premium Carrillo YZ 450F connecting rod provides superior strength for extreme high performance and racing YZ450F engines. Designed with legendary Carrillo quality to give you an extremely strong and dependable replacement connecting rod at a reasonable price. Can be used as a stock replacement connecting rod as well as for high performance and racing engines, including big bore engines. |
2003 - 2009 YZ 450F Connecting Rod YA-45CA-2<-04075N |
2010 - 2014 YZ 450F Connecting Rod YA-4510CA-2<-04055N |
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Replacement Special Carrillo YZ450F Rod for use with Platinum Series Piston |
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| The YZ 450F connecting rods listed in this row are for use ONLY with the matching CP Platinum series pistons. This rod is 2.5mm longer than the stock rod which is why it must be used with the matching Platinum series CP Piston. | 2003 - 2009 YZ450 F Platinum Kit Rod YA-4518CA<-04173N |
2010 - 2014 YZ450F Platinum Kit Rod YA-4510CA-2<-04153N |
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The pistons and gaskets listed on this page fit the following model year YZ450F Dirt bike engines:
2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 YZ450 F
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